Hello, I have just bought a Welch 1402 second hand which I want to use
to degas silicone and urethane/resin.

1) Where do you put the oil? (crazy question I know)

Pour it into the exhaust port.

2) what oil is acceptable to use I have some Robinair direct drive oil
and in a thread I researched somebody mentioned curt lesker and
company Tv-019 I want as good a vacuum as I can get without recking
the pump, but I am not sure I want to pay Welch Duo seal oil prices.

3) The inlet and outlet ports do not have barbs screwed in does
anybody know of a source for 13/16th 20thread/in barbs (that dont cost
welch prices -60 bucks a piece)

www.duniway.com has the nipples for $20 each. Their prices on oil and
other stuff are usually very good; I've used a lot of their conflat
flange copper gaskets over the years, and they sell all the parts to
rebuild your pump when you need to.

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Regards,
Carl Ijames carl.ijames at verizon.net